
Answer:
p = 3 dollars   d = 4 dollars
Step-by-step explanation:
2 p + 1 d  = 10   given
4 p + 1 d  = 16   given    Subtract second equation from first to get:
-2p = - 6
p = 3 dollars     then use this value in either of the equations to find  'd'
2(3) Â + d = 10
d = 4